CN103344706B - Design method for linear array phased array probe - Google Patents
Design method for linear array phased array probe Download PDFInfo
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- CN103344706B CN103344706B CN201310259852.8A CN201310259852A CN103344706B CN 103344706 B CN103344706 B CN 103344706B CN 201310259852 A CN201310259852 A CN 201310259852A CN 103344706 B CN103344706 B CN 103344706B
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Abstract
The invention discloses a design method for a linear array phased array probe, and belongs to the technical field of phased array probes, and the design method is used for solving the problem that an existing one-dimensional linear array phased array probe only can achieve delay focusing in a one-dimensional direction and cannot cope with a complex and changeable detected structure. According to the design method, the surface of one side, provided with a phased array wafer, of the one-dimensional linear array phased array probe and one side of the plane of a column-shaped sound lens are coupled through a coupling agent and fixed through a bolt, a symmetric axis beta of the one-dimensional linear array phased array probe is coincided with a symmetric axis alpha of the column-shaped sound lens, the column-shaped sound lens comprises a first plane mounting part, a second plane mounting part and a lens processing part, the thickness of the first plane mounting part is equal to that of the second plane mounting part, the thickness of the edge, connected with the first plane mounting part and the second plane mounting part respectively, of the lens processing part is equal to that t of the first plane mounting part, and the lens processing part is of a lens structure with a curvature radius R in a length direction. The invention relates to the design method for the phased array probe.
Description
Technical field
The present invention relates to the method for designing of linear array phased array probe, belong to phased array probe technical field.
Background technology
Ultrasonic phased array technology causes people with its acoustic beam deflection angle control flexibly and focal position control ability and pays close attention to more and more.Linear array phased array probe is a kind of ultrasonic phase array form simplified most, and its manufacturing cost is relatively minimum, and control mode is also relative simplicity.Its shortcoming can only postpone to focus on to realization at one-dimensional square, and the shape in its sound field focusing region is similar to normally used line focus probe.In order to tackle detected structure complicated and changeable, develop the ultrasonic phased array probe of various shape and multiple array format at present.Although the phased array probe that these are different, array way is complicated meets the requirement for special detected structure in engineering, but its shortcoming that cannot avoid is that narrow application range, tailor-made cycle are long, expensive, and the complexity of equipment complexity and computer control system increases, and is unfavorable for popularization and the use of ultrasonic phased array technology.
Existing linear array phased array probe owing to can only focus on to realization at one-dimensional square, thus causes that ultrasonic energy is not concentrated, poor signal to noise, scan image have distortion.
Summary of the invention
The present invention can only postpone to focus on to realization at one-dimensional square to solve existing one-dimensional linear array phased array probe, therefore can not tackle the problem of detected structure complicated and changeable, provide a kind of method for designing of linear array phased array probe.
The method for designing of linear array phased array probe of the present invention, it realizes based on one-dimensional linear array phased array probe and cylindricality sound lens,
The plane side on the surface and cylindricality sound lens that one-dimensional linear array phased array probe are provided with phased array wafer side is coupled by couplant, and be bolted, the axis of symmetry β of one-dimensional linear array phased array probe overlaps with the axis of symmetry α of cylindricality sound lens simultaneously
Cylindricality sound lens is made up of the first flat mounting section, the second flat mounting section and lens processing department, first flat mounting section is identical with the thickness of the second flat mounting section, lens processing department is identical with the thickness t of the edge thickness that the second flat mounting section is connected and the first flat mounting section with the first flat mounting section respectively, lens processing department is along its length for having the lens arrangement of radius of curvature R
First flat mounting section and the second flat mounting section are that specular is arranged along the axis of symmetry of cylindricality sound lens, and the working depth x arranging lens processing department is:
In formula, R is the radius-of-curvature of lens processing department, and b is the width of one-dimensional linear array phased array probe, the Width of this one-dimensional linear array phased array probe perpendicular to its axis of symmetry β direction,
According to the thickness that t=x+ δ, δ are lens processing department,
Make δ value be meet on the basis of above-mentioned requirements at x, downward round numbers, realizes the design of linear array phased array probe.
The preparation method of the radius of curvature R of described lens processing department is:
Determine the depth of focus D that detected component needs according to analyzing characterization processes and detect water journey L, calculate when the sound beam focusing to be detected of described linear array phased array probe is in the following depth of focus D of detected component surface, the water mid-focal length F of described acoustic beam to be detected, then the radius of curvature R obtaining lens processing department is calculated according to geometric acoustics principle.
The mode that one-dimensional linear array phased array probe is coupled by oil immersion with cylindricality sound lens is coupled; For water logging is coupled or spray water and be coupled between cylindricality sound lens with work to be detected.
Described cylindricality sound lens is with when being coupled for spraying water between work to be detected, the two ends in lens processing department recessed face along its length adopt marine glue bonding plastics sheet respectively, with the two ends of shutoff lens processing department, the recessed side surface of cylindricality sound lens is made to form the three-back-shaped structure with frame, the frame of the three-back-shaped structure of cylindricality sound lens is coated with software spongy layer, this software spongy layer is used for retaining, and the thickness h of this software spongy layer is set to: h=L+2
First flat mounting section or second flat mounting section of cylindricality sound lens have inlet through hole in the width direction, and this Width is perpendicular to the axis of symmetry α direction of cylindricality sound lens, and described inlet through hole communicates with the recessed position of lens processing department.
The value of described detection water journey L is: L=5.
Advantage of the present invention: the present invention is based on focusing ultrasonic wave principle, the probe of design is without the need to using expensive face type or the phased array system of particular array form, only need the simplest linear array phased array probe, one-dimensional linear array phased array probe is made to realize in the two-dimensional direction focusing on, avoid and use complexity and the two-dimensional array phased array probe of costliness, greatly saved cost.It shortens the construction cycle of probe simultaneously, and can reduce the complexity of phased array devices and control system.
The present invention is applicable to water coincidence formula C Scanning Detction, the situation that the depth of focus is certain.The designed probe of the present invention is used in detection, and it detects the impact not by scantling and shape, and quote scope wide, detection efficiency is high.
Accompanying drawing explanation
Fig. 1 is the front view of cylindricality sound lens of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Fig. 4 is structural representation one-dimensional linear array phased array probe being provided with phased array wafer side;
Fig. 5 is the structural representation of linear array phased array probe of the present invention;
Fig. 6 is coupled for spraying water between cylindricality sound lens with work to be detected, the structural representation of cylindricality sound lens;
Fig. 7 is the side view of Fig. 6;
Fig. 8 is the vertical view of Fig. 6;
Fig. 9 is that linear array phased array probe of the present invention is for detecting view during detected component;
Figure 10 be linear array phased array probe of the present invention for detecting detected test specimen time, the ultrasonic acoustic field pattern of the detected test specimen X-Z cross-sectional internal of acquisition; In figure, 0,50% and 100% represents the colourity in figure, i.e. colourity bar;
Figure 11 is the ultrasonic acoustic field pattern of the detected test specimen Z-Y cross-sectional internal adopting conventional transducer to obtain;
Figure 12 is the ultrasonic acoustic field pattern of the detected test specimen Z-Y cross-sectional internal adopting linear array phased array probe of the present invention to obtain;
Figure 13 is the C scanning result of the detected test specimen using conventional linear array phased array probe to obtain;
Figure 14 is the C scanning result of the detected test specimen adopting linear array phased array probe of the present invention to obtain;
The C scanning result of the detected test specimen that Figure 15 uses conventional single sheet point focusing probe to obtain;
Detected test specimen in Figure 10-Figure 15 is same detected test specimen.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1 to Fig. 9, the method for designing of linear array phased array probe described in present embodiment, it realizes based on one-dimensional linear array phased array probe 1 and cylindricality sound lens 2,
The plane side on the surface and cylindricality sound lens 2 that one-dimensional linear array phased array probe 1 are provided with phased array wafer side is coupled by couplant, and be bolted, the axis of symmetry β of one-dimensional linear array phased array probe 1 overlaps with the axis of symmetry α of cylindricality sound lens 2 simultaneously
Cylindricality sound lens 2 is made up of the first flat mounting section 2-1, the second flat mounting section 2-2 and lens processing department 2-3, first flat mounting section 2-1 is identical with the thickness of the second flat mounting section 2-2, lens processing department 2-3 is identical with the thickness t of the edge thickness that the second flat mounting section 2-2 is connected and the first flat mounting section 2-1 with the first flat mounting section 2-1 respectively, lens processing department 2-3 is along its length for having the lens arrangement of radius of curvature R
First flat mounting section 2-1 and the second flat mounting section 2-2 is that specular is arranged along the axis of symmetry of cylindricality sound lens 2, and the working depth x arranging lens processing department 2-3 is:
In formula, R is the radius-of-curvature of lens processing department 2-3, and b is the width of one-dimensional linear array phased array probe 1, the Width of this one-dimensional linear array phased array probe 1 perpendicular to its axis of symmetry β direction,
According to the thickness that t=x+ δ, δ are lens processing department 2-3,
Make δ value be meet on the basis of above-mentioned requirements at x, downward round numbers, realizes the design of linear array phased array probe.
Designing the probe of acquisition in present embodiment, by adding cylindricality sound lens 2, and designing its core parameter and size, achieve the improvement to probe focusing acoustic field.One-dimensional linear array phased array probe 1 and cylindricality sound lens 2 are fixed by bolt compact siro spinning technology.
Embodiment two: present embodiment is described further embodiment one, described in present embodiment, the preparation method of the radius of curvature R of lens processing department 2-3 is:
Determine the depth of focus D that detected component needs according to analyzing characterization processes and detect water journey L, calculate when the sound beam focusing to be detected of described linear array phased array probe is in the following depth of focus D of detected component surface, the water mid-focal length F of described acoustic beam to be detected, then the radius of curvature R obtaining lens processing department 2-3 is calculated according to geometric acoustics principle.
In present embodiment, need first obtain depth of focus D and detect water journey L, then calculate when sound beam focusing is in the following degree of depth D of detected component surface, the due water mid-focal length F of this acoustic beam, then geometric acoustics principle is utilized, by the anti-radius of curvature R releasing lens processing department 2-3 of water mid-focal length F.
Embodiment three: present embodiment is described further embodiment one or two, the mode that one-dimensional linear array phased array probe 1 described in present embodiment and cylindricality sound lens 2 are coupled by oil immersion is coupled; For water logging is coupled or spray water and be coupled between cylindricality sound lens 2 with work to be detected.
Embodiment four: present embodiment is described below in conjunction with Fig. 6 to Fig. 8, present embodiment is described further embodiment three, when being coupled for spraying water between cylindricality sound lens 2 with work to be detected described in present embodiment, the two ends in lens processing department 2-3 recessed face along its length adopt marine glue bonding plastics sheet respectively, with the two ends of shutoff lens processing department 2-3, the recessed side surface of cylindricality sound lens 2 is made to form the three-back-shaped structure with frame, the frame of the three-back-shaped structure of cylindricality sound lens 2 is coated with software spongy layer 3, this software spongy layer 3 is for retaining, the thickness h of this software spongy layer 3 is set to: h=L+2,
First flat mounting section 2-1 or the second flat mounting section 2-2 of cylindricality sound lens 2 have inlet through hole 2-4 in the width direction, this Width is perpendicular to the axis of symmetry α direction of cylindricality sound lens 2, and described inlet through hole 2-4 communicates with the recessed position of lens processing department 2-3.
In present embodiment, plastic sheet can adopt thin hard plastic sheet; Lens processing department 2-3 when processing, directly can also reserve the slab construction of 5 ~ 10mm length at the two ends of length direction, in order to installing water injector.Use the retaining of software spongy layer 3, can keep being coupled between cylindricality sound lens 2 with detected component well.
In use, the delay of demand fulfillment phased array devices focuses on rule and formulates mode probe of the present invention.Its concrete methods of realizing is: first the lens processing department 2-3 thickness of cylindricality sound lens 2 is considered as δ; Then phased array wafer is set and focuses on rule, make ultrasound wave be the sound lens of δ through thickness successively, after thickness is the water layer of L, focus in the designated depth of test specimen.
Embodiment five: present embodiment is described below in conjunction with Fig. 1 to Figure 15, present embodiment is described further embodiment one, two, three or four, and the value detecting water journey L described in present embodiment is: L=5.
Experimental verification: take overlaying structure as research object, the method for quick of research joint quality, as shown in Figure 9, in figure, arrow represents direction of motion for detection mode and detected object.In order to adjust detection sensitivity exactly, the mode of electrosparking in experiment, is used to make flat-bottom hole artificial defect FBH, concordant with material faying face at the bottom of hole, in order to the incomplete fusion defect on modeling interface.
Theory calculate: phased array probe can utilize the mode of electronic scanning to replace the mechanical scanning along X-direction, make carry out C scanning time avoid probe and test specimen carry out relative motion, decrease motion in one dimension degree of freedom.But there is apparent shortcoming in this method: linear array phased array probe cannot make ultrasonic energy converge along Y direction, thus may occur series of problems.Predict theoretically, this one-dimensional focusing mode, owing to not concentrating along Y direction energy, causes its detection sensitivity will lower than two-dimension focusing mode.In addition, because the ultrasonic energy along Y direction disperses, when its Scanning Detction, the size of defect along Y-axis, namely can be elongated along probe movement direction and distorts, thus cannot the truth of reflect structure inside.
Set up the experiment mechanism shown in Fig. 9, create corresponding mathematical model in a computer, the ultrasonic sound field distribution situation of detected test specimen X-Z cross-sectional internal under calculating current experiment parameter by CIVA software, as shown in Figure 10.
Meanwhile, in order to verify advantage of the present invention by contrast, this experiment uses MATLAB to calculate the ultrasonic sound field distribution situation improving front and back Y-Z cross-sectional internal, as is illustrated by figs. 11 and 12
As can be seen from the contrast of sonic pressure field distribution, the phased array probe sonic pressure field concentration of energy after improvement, is significantly better than conventional linear array phased array probe.In theory, ultrasonic energy divides breaking up to cause signal to noise ratio (S/N ratio) to reduce, and also can make the shape of defect, positional information generation deviation simultaneously, not be inconsistent with actual conditions.
Experimental result and analysis:
Figure 13 is the C scanning result using conventional linear array phased array probe to obtain; Figure 14 is the C scanning result using phased array probe of the present invention to obtain; Figure 15 uses conventional single sheet point focusing probe to carry out C to same test specimen to scan the result obtained.
The C scanning process comparative maturity of single-chip point focusing probe, its scanning result also can gain public acceptance, and therefore this experiment uses the C scanning result of single-chip point focusing probe to contrast the C scanning result of phased array probe, and is used for judging the reliability of testing result.
Contrast from Figure 13 to Figure 15 can find, circular artificial defect is elongated along probe movement direction in conventional phased array probe C scanning result, and present ellipse, the defect can knowing other positions thus by inference also will be elongated by along this direction.Such testing result with above in theoretical analysis and predict substantially identical, show directly to use linear array phased array probe, the image obtained when carrying out two-dimensional detection with electron scanning and mechanical scanning mode exists and distorts.
Contrast Figure 13, Figure 14 and Figure 15 can find: the phased array probe of the present invention's design significantly improves the contrast of image, and solves the aberration problems of linear array phase-array scanning image along Y direction.Experiment proves, the C scanning result of the designed probe of the present invention and the C scanning result of conventional single sheet point focusing probe coincide good.Meanwhile, the sound field simulation result in experimental result and Figure 10, Figure 11 and Figure 12 coincide good.
The time that probe of the present invention completes needed for whole test specimen Scanning Detction far fewer than conventional single sheet probe required time, will improve detection efficiency.And, owing to eliminating probe moving along X-direction, make the mechanical motion mechanism of detection system decrease one degree of freedom, thus reduce the complexity of system.
Claims (2)
1. a method for designing for linear array phased array probe, it realizes based on one-dimensional linear array phased array probe (1) and cylindricality sound lens (2),
The plane side on the surface and cylindricality sound lens (2) that one-dimensional linear array phased array probe (1) are provided with phased array wafer side is coupled by couplant, and be bolted, the axis of symmetry β of one-dimensional linear array phased array probe (1) overlaps with the axis of symmetry α of cylindricality sound lens (2) simultaneously
Cylindricality sound lens (2) is made up of the first flat mounting section (2-1), the second flat mounting section (2-2) and lens processing department (2-3), first flat mounting section (2-1) is identical with the thickness of the second flat mounting section (2-2), lens processing department (2-3) is identical with the thickness t of the edge thickness that the second flat mounting section (2-2) is connected and the first flat mounting section (2-1) with the first flat mounting section (2-1) respectively, lens processing department (2-3) is along its length for having the lens arrangement of radius of curvature R
First flat mounting section (2-1) and the second flat mounting section (2-2) are that specular is arranged along the axis of symmetry of cylindricality sound lens (2), and the working depth x arranging lens processing department (2-3) is:
In formula, R is the radius-of-curvature of lens processing department (2-3), and b is the width of one-dimensional linear array phased array probe (1), the Width of this one-dimensional linear array phased array probe (1) perpendicular to its axis of symmetry β direction,
According to the thickness that t=x+ δ, δ are lens processing department (2-3),
Make δ value be meet on the basis of above-mentioned requirements at x, downward round numbers, realizes the design of linear array phased array probe;
The preparation method of the radius of curvature R of described lens processing department (2-3) is:
Determine the depth of focus D that detected component needs according to analyzing characterization processes and detect water journey L, calculate when the sound beam focusing to be detected of described linear array phased array probe is in the following depth of focus D of detected component surface, the water mid-focal length F of described acoustic beam to be detected, then the radius of curvature R obtaining lens processing department (2-3) is calculated according to geometric acoustics principle;
The mode that one-dimensional linear array phased array probe (1) is coupled by oil immersion with cylindricality sound lens (2) is coupled; Cylindricality sound lens (2) with between workpiece to be detected for water logging is coupled or spray water and be coupled;
It is characterized in that, described cylindricality sound lens (2) is with when being coupled for spraying water between workpiece to be detected, the two ends in lens processing department (2-3) recessed face along its length adopt marine glue bonding plastics sheet respectively, with the two ends of shutoff lens processing department (2-3), cylindricality sound lens (2) recessed side surface is made to form the three-back-shaped structure with frame, the frame of the three-back-shaped structure of cylindricality sound lens (2) is coated with software spongy layer (3), this software spongy layer (3) is for retaining, the thickness h of this software spongy layer (3) is set to: h=L+2,
First flat mounting section (2-1) or second flat mounting section (2-2) of cylindricality sound lens (2) have inlet through hole (2-4) in the width direction, this Width is perpendicular to the axis of symmetry α direction of cylindricality sound lens (2), and described inlet through hole (2-4) communicates with the recessed position of lens processing department (2-3).
2. the method for designing of linear array phased array probe according to claim 1, is characterized in that, the value of described detection water journey L is: L=5.
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| CN109406639A (en) * | 2018-11-23 | 2019-03-01 | 航天科工防御技术研究试验中心 | A kind of point focusing formula linear array phased array detection device |
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| CN104535653B (en) * | 2015-01-20 | 2018-01-26 | 中国人民解放军装甲兵工程学院 | A kind of hole type parts inner hole defect phased array ultrasonic detection device |
| CN105136903B (en) * | 2015-08-13 | 2018-05-22 | 河海大学常州校区 | Cylinder Surface workpiece butt weld transverse defect detection device and method |
| JP6934054B2 (en) * | 2017-07-03 | 2021-09-08 | 株式会社Ｉｈｉ検査計測 | Phased array flaw detectors and methods |
| CN111458414B (en) * | 2020-04-24 | 2021-06-15 | 哈尔滨工业大学 | Ultrasonic phased array transducer device with one-dimensional hinge array structure |
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| FR2596269A1 (en) * | 1986-03-28 | 1987-10-02 | Labo Electronique Physique | APODIZED ULTRASONIC ULTRASONIC ECHOGRAPH WITH LINEAR BARRIER OF PIEZOELECTRIC TRANSDUCERS AND METHOD FOR PRODUCING SAID BARREL |
| JPH0440099A (en) * | 1990-06-04 | 1992-02-10 | Omron Corp | Ultrasonic probe |
| JPH08149591A (en) * | 1994-03-04 | 1996-06-07 | Tokimec Inc | Acoustic lens |
| EP1218115B1 (en) * | 1999-07-02 | 2005-02-16 | Prosonic Company Ltd. | Ultrasonic linear or curvilinear transducer and connection technique therefore |
| CN100399596C (en) * | 2003-03-12 | 2008-07-02 | 中国科学院声学研究所 | Phased array probe for scanning imager |
| JP3909307B2 (en) * | 2003-06-11 | 2007-04-25 | 株式会社日立製作所 | Ultrasonic transmitter |
| CN100506323C (en) * | 2005-01-10 | 2009-07-01 | 重庆海扶(Hifu)技术有限公司 | Integral ultrasonic therapy energy converter |
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| CN100588471C (en) * | 2007-05-18 | 2010-02-10 | 天津医科大学 | Phase control annular ultrasound focusing method |
| CN101664322A (en) * | 2009-09-29 | 2010-03-10 | 绵阳索尼克电子有限责任公司 | Ultrasonic treatment transducer device with phase control structure |
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| CN201969218U (en) * | 2010-12-27 | 2011-09-14 | 天津医科大学 | Concave spherical surface eight-ring phased array high-intensity focused ultrasound energy converter |
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